"Not anti-Semitic to call out George Soros. Leftist media commits all out slander of King," King tweeted, linking to the article from the right-wing website that argues for criticisms of Soros and points to King's visits with Jewish people and gay individuals while in Austria.

King has been the target of much scrutiny for his criticism of Soros and for his association with a Nazi-linked group in Austria that he said is just a "far right" group that would be Republicans if they were in the U.S.

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Many conservatives have defended King's criticism of Soros, who has long been a subject of ire on the right, but have expressed concerns about King's other rhetoric.

King has been at the center of a number of racially charged controversies, previously endorsing a white nationalist candidate in a Toronto mayoral race and tweeting last year, "We can't restore our civilization with somebody else's babies."

A particular point of criticism has been his recent meeting with a paper associated with the Freedom Party in Austria. The Freedom Party is a group founded by a former Nazi SS officer and whose current leader was active in neo-Nazi circles, according to the Washington Post.

King defended the Freedom Party last week, saying he stood by his decision to visit its members.

“At the end of the second World War in Austria, if you were involved in government you had Nazi ties,” King said in a speech in Des Moines, Iowa Public Radio reports.

King said all former Nazi officers were “purged” out of the party, “except for youthful affiliation for one of them.”

The Freedom Party's current head, Heinz-Christian Strache, was involved in neo-Nazism as a young man.